Hot-air furnace.



No. 683,674. Patented Oct. 1, I901.

W. WILLIAMS.

HOT AIR FURNACE. (Application med May 31, i901. (No Model.) 2 Sheets-Sheet l.

tmmm o' WZdWaWZZai/ZEZZ, M tlg'z/ a g mama,

No. 683,674. Patented Oct. l, l90l.

( W WILLIAMS HOT AIR FURNACE. (Application filed m 31, 19011 2 shgis' sheet 2.

(No Model.)

' Suwzutoe I witnesses view of a hot-air furnace constructed in ac- UNITED STATES PATENT OFFIcE.

WILLIAM WILLIAMS, OF AUSTIN, MINNESOTA.

HOT-AIR FURNACE.

SPECIFICATION formingpart of Letters Patent No. 683,674, dated October 1, 1901.

Application filed May 31, 1901.

To all whom it may concern:

Be it known that 1, WILLIAM WILLIAMS, a citizen of the United States, residing at Austin, in the county of Mower and State of Minnesota, have invented certain new and useful Improvements in Hot-Air Furnaces; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon.

The present invention has for its object to provide a hot-air furnace that will be simple in construction and compact in form to economize space and at the same time present the greatest amount of surface to come in direct contact with the heat, thereby increase its radiating-surface, and consequently generate a maximum amount of heat with the minimum amount of fuel; also in providing the furnace with double fire-pots, so that one or both may be used as circumstances require, thereby making it possible to adapt the furnace to the severity of the weather. These several objects I attain by a hot-air furnace constructed substantially as shown in the drawings and hereinafter described and claimed.

Figure I of the drawings is a perspective cordance with my invention; Fig. 2, a central sectional elevation thereof; Fig. 3, a bottom plan view showing the two grates forming the bottom of the two fire-pots.

In the accompanying drawings, A represents the dome of the furnace, provided with the usual door a, said dome fitting down over the grate-plate b, as shown in Fig. 2 of the drawings, and also over the two fire-pots B C. These fire-pots B O are separated by the hot-air box D, which extends across the furnace between the two grates E F, as shown in Fig. 3 of the drawings. A hot-air tube G back of the dome A communicates with the hot-air box D through the medium of a collar 0, over which the tube fits, said tube connecting with the cold-air flue II below the fire-pots. At the back of the dome A is a curved radiat ing-drum I, supported by brackets N. The

Serial No. 62,555. (No model.)

curve of the drum corresponds with the curve of the dome, so as to render the furnace as compact as possible and provide the required radiating-surface. Thisdrumcommunicates with the interior of the furnace at the top thereof through the medium of pipe .I and the transverse pipe K, arranged with relation to each other as shown in Fig. 1 of the drawings, the pipes J K communicating with the drum and dome, respectively. Communicating with these pipes is a smoke-pipe L, which is joined to the pipe J and is provided with a suitabledamperfand rodgforoperatingit,the hot air and smoke freely circulating through these pipes and the products of combustion passing out through the smoke'pipe. The radiating-drum I is provided with openings having flanges d, over which fit removable caps 6, whereby access may be obtained to the interior of the drum as-may be required. By means of the damper in the smoke-pipe hereinbefore described the draft may be regulated and controlled, either to pass out through the pipe or into the drum.

The base M of the furnace has the-usual door h, and two grates E F are provided, one for each of the fire-pots B C, said grates be ing of any suitable-construction, but preferably of a plurality of notched and pivotallyconnected plates 3', connected together by pivoted straps k and provided with crank-rods t' for operating the grates, the notched plates thereof in each series moving together in opening or closing.

' Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A hot-air furnace, comprising a suitable dome having a hot-air tube extending therethrough, a hot-air box extending across the furnace and communicating with the hot-air tube, a cold-air flue communicating with the hot-air tube, and a drum communicating with the interior of the dome, substantially as and for the purpose set forth.

2. A hot-air furnace, comprising a suitable base having double grates, a dome located over the base, a hot-air box extending across the furnace between the two grates, a coldair flue extending through the base and c0nimunicating with the hot-air box, a hot-air tube communicating with the hot-air box and extending up through the dome, and a, drum communicating with the interior of the dome, substantially as and for the purpose described.

Witnessesz' IDA S. EARL, L. F. OLAUsEN.

, Invitestimony that I claim theabev'e I have 

